Ultra-steep spectrum radiosources

Radio sources with ultra-steep spectra (USS; spectral index ~2. The samples are selected from the set of catalogues referenced below, in a range of frequencies from 38 to 408MHz; they are are fainter by a factor of three than the previously well-studied samples of USS sources from 4C. Snapshot observations of sources from these samples have been made with the VLA at 1.5arcsec resolution and are presented in the printed paper. The list of the sources (Appendix A of the paper) includes positions, flux densities and radio structures for a total number of 605 sources derived from these observations.

Cone search capability for table J/A+AS/108/79/source (Source list)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+AS/108/79
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/108/79
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/108/79
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+AS/108/79
Provenance
Creator Roettgering H.J.A.; Lacy M.; Miley G.K.; Chambers K.C.; Saunders R.
Publisher CDS
Publication Year 1997
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Natural Sciences; Physics